USB Volume Controller Computer USB Volume Adjustable Controller Support Shortcut Keys Customizable with RGB Default volume control function, clockwise to reduce the volume, counterclockwise to increase the volume, press the knob to mute._x000D_ Compatible with a variety of system devices, suitable for mobile phones, tablets, notebooks, desktop computers, compatible with Windoens and Andriod systems._x000D_ Type-C interface, plug and play._x000D_ RGB lighting effect, can be turned off._x000D_ The software can customize the button function: with the key value editing software, different button functions can be customized._x000D_ _x000D_ Instructions for use: Insert the USB cable, the RGB light turns on, press the knob for 2 seconds to turn off the light, and press the knob for 2 seconds to turn on the light. Default volume control function, clockwise to reduce the volume, counterclockwise to increase the volume, press to mute._x000D_ Colour:Black_x000D_ Material:Acrylic + Aluminum Alloy_x000D_ _x000D_ Package Contents:_x000D_ 1 x USB Volume Controller_x000D_ 1 x Type-C Cable_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_